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The main factors that cause the aging of the rubber conveyor belt

Number of visits: Date:2017-4-6

Conveyor belt is the key equipment of the conveying system, its safe and stable operation directly affects the production operation. In the use of the conveyor belt, easy to out of the rubber layer aging, shedding phenomenon, then the factors that cause rubber aging there are seven main aspects:

1, oxygen: oxygen in the rubber with the rubber molecules free radical chain reaction, molecular chain fracture or excessive cross-linking, causing changes in rubber properties. Oxidation is one of the important reasons for the aging of rubber.

2, ozone, ozone chemical activity is much higher than the oxygen, more destructive, it is also the molecular chain fracture, but the role of ozone on the rubber with the rubber deformation or not different. When used as a deformed rubber (mainly unsaturated rubber), there is a crack that is perpendicular to the direction of the stress, the so-called "ozone cracking"; when the rubber is deformed, only the oxide film is formed on the surface without cracking.

3, the mechanical stress: the conveyor belt in the mechanical stress under repeated action and the roller and the continuous friction process, will break the rubber molecular chain to generate free radicals, lead to oxidation chain reaction, the formation of chemical process. Mechanical fracture molecular chain and mechanical activation oxidation process. Which can prevail, depending on the conditions in which it is located. In addition, under the action of stress easily lead to ozone cracking.

4, moisture: the role of water in two ways: the rubber in the humid air rain or soak in the water, easy to damage, this is due to the rubber in the water-soluble substances and water groups and other ingredients extracted by water. Hydrolysis or absorption and other causes. Especially in the water immersion and atmospheric exposure of the alternating effect, will accelerate the destruction of rubber. But in some cases the moisture on the rubber can not afford to damage, and even delay the role of aging.

5, heat: increase the temperature can cause rubber thermal cracking or thermal crosslinking. But the basic role of heat or activation. Increase the rate of oxygen diffusion and activation of oxidation, thereby accelerating the rate of oxidation of rubber, which is a common phenomenon of aging - thermal oxygen aging.

6, light: the shorter the light, the greater the energy. The rubber is the destruction of the role of high energy UV. In addition to UV can directly lead to the rubber molecular chain of the fracture and cross-linking, the rubber due to the absorption of light energy generated free radicals, trigger and accelerate the oxidation chain reaction process. UV light plays the role of heating. The other characteristic of the light action (unlike the thermal effect) is that it is mainly in the rubber surface. High hardness of the sample, both sides will appear reticular cracks, the so-called "light outer crack."

7, other: the role of the rubber there are chemical medium, variable metal ions, high-energy radiation, electricity and biological.

TypeInfo: Industry news

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